2644403345 has 8 divisors (see below), whose sum is σ = 3173752680. Its totient is φ = 2115210240.

The previous prime is 2644403339. The next prime is 2644403351. The reversal of 2644403345 is 5433044462.

2644403345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2644403339) and next prime (2644403351).

It can be written as a sum of positive squares in 4 ways, for example, as 668067409 + 1976335936 = 25847^2 + 44456^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2644403345 - 2⁸ = 2644403089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135 + ... + 72755.

It is an arithmetic number, because the mean of its divisors is an integer number (396719085).

Almost surely, 2^2644403345 is an apocalyptic number.

It is an amenable number.

2644403345 is a deficient number, since it is larger than the sum of its proper divisors (529349335).

2644403345 is an equidigital number, since it uses as much as digits as its factorization.

2644403345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78115.

The product of its (nonzero) digits is 138240, while the sum is 35.

The square root of 2644403345 is about 51423.7624547252. The cubic root of 2644403345 is about 1382.8526277042.

The spelling of 2644403345 in words is "two billion, six hundred forty-four million, four hundred three thousand, three hundred forty-five".